色甘酸钠预防哮喘发作的主要机制是
A.直接松弛支气管平滑肌B.稳定肥大细胞膜,抑制过敏介质释放C.阻断腺苷受体D.促进儿茶酚胺释放E.激动β受体
参考答案:B
根据短文内容和所给首字母,在空格处填入一个适当的词,使短文意思完整。
Round eyes, round head , round ears , round body ! What is this lovely little animal ?He looks l_70__a bear .But he is not a bear . He is a KOALA .
People in Australia love koalas and take care of t_71___.They have set up (建立)places for koalas to live s_72___. No one can kill them for their pretty fur .When a koala is b__73_,he has no fur .And he is not as big as your little toe ! The mother koala has a pocket in the front of her b_74_. The baby goes into this warm pocket .There he stays for six m_75__.
People in Australia love koalas and take care of t_71___.They have set up (
建立)places for koalas to live s_72___. No one can kill them for their pretty fur .When a koala is b__73_,he has no fur .And he is not as big as your little toe ! The mother koala has a pocket in the front of her b_74_. The baby goes into this warm pocket .There he stays for six m_75__.
The koala could not live w_76__a special kind of tree .The tree gives him both his home and his food . For most of the day the koala s__77___in the tree .
The koala could not live w_76__a special kind of tree .The tree gives him both his home and his food . For most of the day the koala s__77___in the tree
.
At night the koala looks for food . He may go miles to find it . He likes eating only the bark (树皮) and the l__78___of the trees . He eats n__79___ else . And he eats more than two pounds each night !
At night the koala looks for food . He may go miles to find it . He likes eating only the bark (
树皮) and the l__78___of the trees . He eats n__79___ else . And he eats more than two pounds each night !
How lovely the koalas are really !
注册会计师正在对被审计单位的采购与循环进行审计,请运用专业判断回答下列问题。
注册会计师在对被审计单位的存货跌价准备进行审计时,下列各项中,对存货跌价准备直接构成影响的有( )。
A.为获得银行贷款,已作抵押的存货 B.本期购入的存货已霉烂变质,没有任何价值 C.受托加工存货市价下跌 D.委托代销的存货市价下跌